CN105695687A - Novel 45 steel spheroidizing annealing process - Google Patents
Novel 45 steel spheroidizing annealing process Download PDFInfo
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- CN105695687A CN105695687A CN201410701566.7A CN201410701566A CN105695687A CN 105695687 A CN105695687 A CN 105695687A CN 201410701566 A CN201410701566 A CN 201410701566A CN 105695687 A CN105695687 A CN 105695687A
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Abstract
The invention discloses a novel 45 steel spheroidizing annealing process. The novel 45 steel spheroidizing annealing process is characterized in that a heat treatment process comprises the following steps that heating is conducted to 670-695 DEG C at the heating speed of 15-25 DEG C/h, and heat preservation is conducted for 4.8-5 h; heating is conducted to 730-760 DEG C at the heating speed of 5-10 DEG C/h, and heat preservation is conducted for 4.8-5 h; the inside of a furnace is cooled to 660-680 DEG C at the cooling speed of 30-35 DEG C/h; heat preservation is conducted for 13-15 h; and after the furnace is cooled to 580-600 DEG C, an outer cover is taken away, then cooling is continued to 250-300 DEG C, and air cooling is conducted to the indoor temperature after taking out. According to the novel 45 steel spheroidizing annealing process, through strict process parameter control, good strength, plasticity and other mechanical properties can be obtained.
Description
Technical field
The invention belongs to Technology for Heating Processing field, specifically a kind of novel 45 steel annealing process。
Background technology
For making 45 steel have required mechanical property, physical property and chemical property, except reasonable selection material and various forming technology, Technology for Heating Processing is requisite often。It does not change the profile of 45 steel, can be given full play to the potentiality of 45 steel by heat treatment, and give the various properties required for 45 steel, reaches to improve 45 steel qualities, increases the service life, it is ensured that the purpose that machine is safe and reliable to operation。Nearly all strength member will through Overheating Treatment, and it has been widely used in mechanical industry。" do heat treatment well, part one pushes up several ", describe the heat treatment importance to improving product quality。Although the progress along with science and technology, the heat treatment production technology of China also there occurs the change updated, owing to plasticity and toughness can be significantly improved after 45 steel spheroidisings, it is easy to machining and prevents Pressing Deformation from ftractureing, therefore require strictly to research and analyse very much to the nodularization of 45 steel, experimental verification, just can obtain more reasonably Technology for Heating Processing。And existing technique nodularization temperature is lower than critical point Ac1 and slightly higher with two kinds of methods of critical point Ac3, needed for the method, the cycle is long, nodularization effect is not good, production qualification rate is low, only about 60%, the not good reason of nodularization is mainly temperature retention time and causes that flaky carbide fails enough to dissolve nodularization not, has both had a strong impact on date of delivery, causing again annealing again to cause economic loss。Its nodularization temperature and rate of cooling impact are extremely important。
Summary of the invention
It is an object of the invention to for Shortcomings part in above-mentioned technology, the present invention provides a kind of novel 45 steel annealing process, it is possible to increase comprehensive mechanical performance。
The technical scheme realizing the object of the invention is as follows:
A kind of novel 45 steel annealing process, it is characterised in that its Technology for Heating Processing comprises the following steps:
It is heated to 670-695 DEG C with 15-25 DEG C/h firing rate, is incubated 4.8-5h, is heated to 730-760 DEG C with 5-10 DEG C/h firing rate, be incubated 4.8-5h, in stove, be cooled to 660-680 DEG C with 30-35 DEG C/h rate of cooling；Insulation 13-15h, cancels outer housing after furnace cooling to 580-600 DEG C, be further continued for being cooled to after 250-300 DEG C of taking-up air cooling to room temperature。
The novel 45 steel annealing process of one of the present invention, by strict process parameter control, can obtain the mechanical performances such as good intensity, plasticity。
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of novel 45 steel annealing process, its Technology for Heating Processing comprises the following steps:
It is heated to 685 DEG C with 15-25 DEG C/h firing rate, is incubated 5h, is heated to 750 DEG C with 6 DEG C/h firing rate, be incubated 5h, in stove, be cooled to 670 DEG C with 32 DEG C/h rate of cooling；Insulation 13.5h, cancels outer housing after furnace cooling to 685 DEG C, be further continued for being cooled to 260 DEG C take out after air cooling to room temperature。
The novel 45 steel annealing process of one of the present invention, by strict process parameter control, can obtain the mechanical performances such as good intensity, plasticity。
The preferred embodiment of the present invention described in detail above。Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work。All technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment。
Claims (1)
1. novel 45 steel annealing process, it is characterized in that, its technique comprises the following steps: be heated to 670-695 DEG C with 15-25 DEG C/h firing rate, insulation 4.8-5h, it is heated to 730-760 DEG C with 5-10 DEG C/h firing rate, insulation 4.8-5h, cools down 660-680 DEG C with 30-35 DEG C/h rate of cooling in stove；Insulation 13-15h, cancels outer housing after furnace cooling to 580-600 DEG C, be further continued for being cooled to after 250-300 DEG C of taking-up air cooling to room temperature。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701566.7A CN105695687A (en) | 2014-11-28 | 2014-11-28 | Novel 45 steel spheroidizing annealing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701566.7A CN105695687A (en) | 2014-11-28 | 2014-11-28 | Novel 45 steel spheroidizing annealing process |
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| CN105695687A true CN105695687A (en) | 2016-06-22 |
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| CN201410701566.7A Pending CN105695687A (en) | 2014-11-28 | 2014-11-28 | Novel 45 steel spheroidizing annealing process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521107A (en) * | 2016-10-17 | 2017-03-22 | 江阴兴澄特种钢铁有限公司 | Novel spheroidizing annealing method for low-carbon bainite steel |
| CN108384929A (en) * | 2018-04-25 | 2018-08-10 | 黄骅聚金五金制品有限公司 | A kind of annealing process of high-intensity fasteners bolt material |
| CN111876564A (en) * | 2020-07-14 | 2020-11-03 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
-
2014
- 2014-11-28 CN CN201410701566.7A patent/CN105695687A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521107A (en) * | 2016-10-17 | 2017-03-22 | 江阴兴澄特种钢铁有限公司 | Novel spheroidizing annealing method for low-carbon bainite steel |
| CN108384929A (en) * | 2018-04-25 | 2018-08-10 | 黄骅聚金五金制品有限公司 | A kind of annealing process of high-intensity fasteners bolt material |
| CN111876564A (en) * | 2020-07-14 | 2020-11-03 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
| CN111876564B (en) * | 2020-07-14 | 2022-03-04 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
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Legal Events
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Application publication date: 20160622 |
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| WD01 | Invention patent application deemed withdrawn after publication |